3A 2 port USB EP-TA10UWE

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Official specifications:
I got it from Ebay dealer: single2000

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Measurements


3A%202%20port%20USB%20EP-TA10UWE%20android%20load%20sweep
3A%202%20port%20USB%20EP-TA10UWE%20iOS%20load%20sweep

Each output can deliver 2.2A before the overload protection trips.

3A%202%20port%20USB%20EP-TA10UWE%20load%20sweep

And because they are in parallel the total output is also 2.2A, not the rated 3A (It looks like the dealer knows this).

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But it cannot deliver 2A for 1 hour, the output turned off after 15 minutes.

3A%202%20port%20USB%20EP-TA10UWE%201.5A%20load%20test

I could draw 1.5A for 1 hour without any problems.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp2912

M1: 52,4C, M2: 49,3C, HS1: 58,9C
HS1 is the transformer.

Temp2913

M1: 42,6C, M2: 46,9C, HS1: 55,8C

Temp2914

M1: 62,8C, HS1: 70,0C
HS1 is the rectifier diode.

Temp2915

M1: 51,8C, HS1: 83,0C
HS1 is the rectifier diode.

Temp2916

M1: 60,6C, HS1: 66,5C
HS1 is the switcher IC.

10ohm

Noise at 0.5A load is 128mV rms and 1270mVpp

5ohm

Noise at 1A load is 155mV rms and 1300mVpp

2.5ohm

Noise at 1A load is 190mV rms and 1500mVpp




Tear down

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Some pressure in my vice and it popped open.

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There is a fuse and a bridge rectifier (BS1) at the input. Under the big capacitor is the switcher IC. The blue capacitor (C2) is not a safety capacitor, but will short when the voltage is too high (Very bad). D3 is the rectifier diode.

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On this side the fuse, the bridge rectifier and the switcher IC can be seen.

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The blue capacitor and the rectifier diode can be seen here.

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Between the two usb connectors the led can be seen.

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On this side there is only a few resistors and a single capacitor.

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Between mains and low volt side there is supposed to be over 6mm, here it is around 1mm (Very bad).


The charger failed a 2500 volt test and shorted between low volt side and mains, this makes the charger dangerous everywhere.



Conclusion

This charger has very bad safety, stay away.



Notes

Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger